MAC хаяг солигдсон үед CentOS, Redhat системд хийх тохиргоо

Дусал нэвтэрхий толь-с

I was playing with My Virtualbox today and i tried to clone some Centos Servers. But after this, when starting the eth0, it is no more available.

check network:

# ifconfig
lo        Link encap:Local Loopback

          inet addr:  Mask:           inet6 addr: ::1/128 Scope:Host           UP LOOPBACK RUNNING  MTU:16436  Metric:1           RX packets:0 errors:0 dropped:0 overruns:0 frame:0           TX packets:0 errors:0 dropped:0 overruns:0 carrier:0           collisions:0 txqueuelen:0

          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

 Try to start Eth0 device

# ifup eth0
Device eth0 does not seem to be present, delaying initialisation

To Solve this :

Delete networking interface rules file so that it can be regenerated and reboot your CentOS system.

# rm /etc/udev/rules.d/70-persistent-net.rules
  1. reboot

New Mac address has been generated:

# This file was automatically generated by the /lib/udev/write_net_rules
  • program, run by the persistent-net-generator.rules rules file.
  • You can modify it, as long as you keep each rule on a single
  • line, and change only the value of the NAME= key.
    1. PCI device 0x8086:0x100e (e1000)
    SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="<span style="color: #ff0000">08:00:27:fe:c1:03</span>", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"

    Now edit /etc/sysconfig/network-scripts/ifcfg-eth0,

    Add   new  HWADDR generated or  remove it 
    Remove UUID   line

    Restart the networking service

    # service network restart

    Shutting down interface eth0:                              [  OK  ] Shutting down loopback interface:                          [  OK  ] Bringing up loopback interface:                            [  OK  ] Bringing up interface eth0:  Determining if ip address is already in use for device eth0...

                                                               [  OK  ]
    # ifconfig

    eth0      Link encap:Ethernet  HWaddr 08:00:27:FE:C1:03           inet addr:  Bcast:xxxxxxxx  Mask:           inet6 addr: fe80::a00:27ff:fefe:c103/64 Scope:Link           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1           RX packets:4400 errors:0 dropped:0 overruns:0 frame:0           TX packets:129 errors:0 dropped:0 overruns:0 carrier:0           collisions:0 txqueuelen:1000

              RX bytes:387597 (378.5 KiB)  TX bytes:19567 (19.1 KiB)